# Sign documents Fast & Secure vs AI 3D Scanner App

The clearest difference is update cadence: AI 3D Scanner App at every 10 days against Sign documents Fast & Secure's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Sign documents Fast & Secure sells 2 in-app purchases, starting at $5.99 per 7 days and AI 3D Scanner App sells 5 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Sign documents Fast & Secure ships an update monthly, AI 3D Scanner App every 10 days. The most recent releases landed on October 19, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Sign documents Fast & Secure | AI 3D Scanner App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Size | 28 MB | 42 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [UPPER UNIT Korlatolt Felelossegu Tarsasag](https://appshunter.io/developer/1896555201) | [棒 杨](https://appshunter.io/developer/1804927261) |

## What reviewers say

### Sign documents Fast & Secure

[App page](https://appshunter.io/ios/app/sign-documents-fast-and-secure/id6768265137)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock full access | $5.99 | per 7 days |
| Fast & Secure Sign Pro | $5.99 | per 7 days |


### AI 3D Scanner App

[App page](https://appshunter.io/ios/app/ai-3d-scanner-app/id6774551713)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3D Scanner App Weekly | $3.99 | per 7 days |
| 3D Scanner Weekly Free Trial | $4.99 | per 7 days |
| 3D Scanner App Weekly | $4.99 | per 7 days |
| 3D Scanner App Monthly | $12.99 | per month |
| 3D Scanner App Yearly | $34.99 | per year |


## Frequently asked questions

### Is Sign documents Fast & Secure free?

Sign documents Fast & Secure is free to download, with in-app purchases available.

### Is AI 3D Scanner App free?

AI 3D Scanner App is free to download, with in-app purchases available.

### Do Sign documents Fast & Secure or AI 3D Scanner App have ads?

Neither Sign documents Fast & Secure nor AI 3D Scanner App shows ads.

### Which is updated more often, Sign documents Fast & Secure or AI 3D Scanner App?

Sign documents Fast & Secure ships an update monthly, and AI 3D Scanner App every 10 days. Most recently, Sign documents Fast & Secure was updated on October 19, 2026 and AI 3D Scanner App on October 16, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*